/* ═══════════════════════════════════════════════════════
   StockFlow — Styles
   ═══════════════════════════════════════════════════════ */
:root,[data-theme=light]{
--bg:#f0f4f8;--surface:#fff;--surface2:#f1f5f9;--border:#e2e8f0;
--text:#0f172a;--text2:#64748b;
--primary:#3b82f6;--primary-h:#2563eb;
--success:#10b981;--warning:#f59e0b;--danger:#ef4444;
--radius:10px;--radius-sm:6px;--shadow:0 1px 3px rgba(0,0,0,.08);
--shadow-md:0 4px 12px rgba(0,0,0,.08);
--sidebar:260px;--header:60px;--font:Inter,system-ui,sans-serif;
}
[data-theme=dark]{
--bg:#0b1120;--surface:#151c2f;--surface2:#1e2942;
--border:#253048;--text:#e2e8f0;--text2:#94a3b8;
--primary:#60a5fa;--primary-h:#93c5fd;--success:#34d399;--warning:#fbbf24;--danger:#f87171;
--shadow:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 4px 12px rgba(0,0,0,.3);
}
*{box-sizing:border-box;margin:0;padding:0}
html{font-size:15px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* Layout */
.app-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:200;overflow:hidden;transition:transform .25s}
.sidebar.collapsed{transform:translate(-100%)}
.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:1rem;height:var(--header);border-bottom:1px solid var(--border)}
.sidebar-brand{font-size:1.3rem;font-weight:700;background:linear-gradient(135deg,var(--primary),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sidebar-nav{flex:1;padding:.5rem 0;overflow-y:auto}
.nav-item{display:flex;align-items:center;gap:.75rem;padding:.65rem 1.25rem;margin:2px .5rem;color:var(--text2);font-weight:500;font-size:.9rem;border-radius:var(--radius-sm);transition:all .15s;text-decoration:none;position:relative}
.nav-item:hover{background:var(--surface2);color:var(--text)}
.nav-item.active{background:color-mix(in srgb,var(--primary) 12%,var(--surface));color:var(--primary);font-weight:600}
.nav-item.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:60%;background:var(--primary);border-radius:0 3px 3px 0}
.nav-icon{font-size:1.15rem;width:1.5rem;text-align:center}
.sidebar-footer{padding:.75rem 1.25rem;border-top:1px solid var(--border)}
.sidebar-footer .user-info strong{display:block;font-size:.85rem}
.sidebar-footer .user-info small{font-size:.75rem;color:var(--text2)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:#0006;z-index:150;opacity:0;transition:opacity .25s}
.sidebar-overlay.active{display:block;opacity:1}

.main-content{flex:1;margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .25s}
.sidebar.collapsed~.main-content{margin-left:0}

.topbar{display:flex;align-items:center;padding:0 1.5rem;height:var(--header);background:var(--surface);border-bottom:1px solid var(--border);gap:.75rem;position:sticky;top:0;z-index:50}
.topbar-title{flex:1;font-size:1.15rem;font-weight:600;color:var(--text)}
.page-content{flex:1;padding:1.5rem;overflow-y:auto}

/* Cards */
.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem;margin-bottom:1rem}
.card:hover{box-shadow:var(--shadow-md)}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border)}
.card-header h3{font-size:1rem;font-weight:600}
.summary-card{text-align:center;padding:1.5rem 1rem;border-top:3px solid var(--primary)}
.summary-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.summary-label{font-size:.75rem;color:var(--text2);margin-bottom:.5rem;text-transform:uppercase;font-weight:600}
.summary-value{font-size:1.5rem;font-weight:700}
.summary-sub{font-size:.78rem;color:var(--text2);margin-top:.25rem}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-bottom:1.5rem}

/* Tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.85rem}
th{text-align:left;font-weight:600;padding:.75rem .5rem;border-bottom:2px solid var(--border);color:var(--text2);font-size:.75rem;text-transform:uppercase;white-space:nowrap}
td{padding:.65rem .5rem;border-bottom:1px solid var(--border);vertical-align:middle}
tr:hover{background:var(--surface2)}
.row-danger{background:color-mix(in srgb,var(--danger) 6%,transparent)}
.row-warning{background:color-mix(in srgb,var(--warning) 6%,transparent)}

/* Forms */
.form-group{margin-bottom:.85rem}
.form-group label{display:block;font-size:.8rem;font-weight:500;margin-bottom:.3rem;color:var(--text2)}
input,select,textarea{width:100%;padding:.55rem .85rem;font-family:var(--font);font-size:.9rem;background:var(--surface);border:1.5px solid var(--border);border-radius:8px;color:var(--text);transition:border-color .15s;min-height:42px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 15%,transparent)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
.form-actions{display:flex;gap:.5rem;margin-top:1rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.55rem 1.1rem;font-family:var(--font);font-size:.875rem;font-weight:500;border:1px solid transparent;border-radius:8px;cursor:pointer;transition:all .15s;min-height:40px;text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{filter:brightness(1.1)}
.btn-secondary{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn-secondary:hover{background:var(--surface2)}
.btn-danger{background:transparent;color:var(--danger);border-color:var(--danger)}
.btn-danger:hover{background:color-mix(in srgb,var(--danger) 10%,transparent)}
.btn-ghost{background:transparent;color:var(--text2)}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
.btn-sm{padding:.35rem .7rem;font-size:.8rem;min-height:34px}
.btn-icon{padding:.4rem;font-size:1.2rem;background:transparent;border:none;cursor:pointer;color:var(--text2);border-radius:8px;min-height:38px;min-width:38px}
.btn-block{width:100%;display:block}
.btn-icon:hover{background:var(--surface2)}

/* Page toolbar */
.page-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;flex-wrap:wrap;gap:.5rem}
.toolbar-actions{display:flex;gap:.5rem;flex-wrap:wrap}

/* Badge */
.badge{display:inline-flex;align-items:center;padding:.2em .65em;border-radius:999px;font-size:.72rem;font-weight:600}
.badge-success{background:color-mix(in srgb,var(--success) 14%,transparent);color:var(--success)}
.badge-danger{background:color-mix(in srgb,var(--danger) 14%,transparent);color:var(--danger)}
.badge-secondary{background:var(--surface2);color:var(--text2)}

/* Toast */
#toast-container{position:fixed;top:1rem;right:1rem;z-index:9999;display:flex;flex-direction:column;gap:.5rem;max-width:380px;width:calc(100% - 2rem)}
.toast{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.75rem 1rem;border-radius:var(--radius);box-shadow:var(--shadow-md);font-size:.875rem;animation:slideIn .25s ease-out;color:#fff}
.toast-success{background:var(--success)}
.toast-error{background:var(--danger)}
.toast-info{background:var(--primary)}
.toast-close{background:none;border:none;color:inherit;opacity:.7;cursor:pointer;font-size:1.15rem;padding:.1rem}
.toast-close:hover{opacity:1}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* Login */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:1.5rem;background:linear-gradient(135deg,var(--bg),color-mix(in srgb,var(--primary) 10%,var(--bg)))}
.login-card{background:var(--surface);border-radius:20px;box-shadow:var(--shadow-md);padding:2.5rem 2.25rem;width:100%;max-width:400px}
.login-title{text-align:center;font-size:2rem;font-weight:700;margin-bottom:2rem;background:linear-gradient(135deg,var(--primary),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.login-error{display:flex;align-items:center;gap:.5rem;margin-top:.75rem;padding:.6rem;background:color-mix(in srgb,var(--danger) 8%,var(--surface));border:1px solid color-mix(in srgb,var(--danger) 20%,transparent);border-radius:10px;color:var(--danger);font-size:.825rem}

/* Misc */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text2)}
.loading{text-align:center;padding:3rem;color:var(--text2)}
.tabs{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:1rem}
.tab{padding:.65rem 1.25rem;font-size:.875rem;font-weight:500;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;color:var(--text2);transition:all .15s}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.danger-zone{border:2px solid var(--danger);border-radius:var(--radius);padding:1.25rem;margin-top:1.5rem}
.danger-zone h3{color:var(--danger);margin-bottom:.5rem}
.text-danger{color:var(--danger)}
.text-muted{color:var(--text2)}
.actions-cell{white-space:nowrap}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:.5rem 1.5rem;font-size:.875rem}
.detail-grid>div{padding:.35rem 0}
.modal-backdrop{position:fixed;inset:0;background:#0006;z-index:500;display:flex;align-items:center;justify-content:center}
.modal{background:var(--surface);border-radius:var(--radius);padding:1.5rem;max-width:500px;width:90%;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-md)}

/* Sales */
.sales-layout{display:grid;grid-template-columns:1fr 380px;gap:1rem}
.sales-products{overflow:hidden;display:flex;flex-direction:column}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem;overflow-y:auto;flex:1;padding:.25rem 0}
.prod-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.85rem;cursor:pointer;transition:all .2s}
.prod-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary)}
.prod-name{font-weight:600;font-size:.85rem;margin-bottom:.25rem}
.prod-price{color:var(--primary);font-weight:700}
.prod-stock{font-size:.75rem;color:var(--text2)}
.cart-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;max-height:calc(100vh - 120px)}
.cart-items{flex:1;overflow-y:auto;padding:.5rem 1rem}
.cart-item{display:flex;align-items:center;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--border)}
.cart-summary{padding:.75rem 1rem;border-top:1px solid var(--border);background:var(--surface2)}
.cart-total{font-weight:700;font-size:1.1rem}
.cart-footer{padding:.75rem 1rem;border-top:1px solid var(--border)}
.file-input{display:none}

@media(max-width:768px){
.sidebar{transform:translate(-100%);width:280px}
.sidebar.open{transform:translate(0)}
.sidebar-overlay{display:block;pointer-events:none}
.sidebar-overlay.active{pointer-events:auto}
.main-content{margin-left:0}
.sales-layout{grid-template-columns:1fr;height:auto}
.grid{grid-template-columns:1fr 1fr}
.form-row{grid-template-columns:1fr}
.page-content{padding:1rem}
}